Pyrographic burner.



C. U. MACY.

PYROGRAPHIG BURNER.

APPLICATION FILED JAN.26, 1909.

929,614. Patented July 27, 1909.

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CHARLES U. MACY, OF IRVINGTON, NEW JERSEY.

PYROGRAPHIC BURNER.

To all 107mm. it may concern:

Be it known that I, CHARLES U. MACY, a citizen of the United States,residing at Irvington, in the county of Essex and State of New Jersey,have invented certain Improvements in Iiyrographic Burners, of which thefollowing is a specification.

The objects of this invention are to secure a pyrographic burnerbody-portion, or lug, as it is commonly called in the trade, which shallserve as a blower to also disperse the smoke, to thus si nplify the useof a blower in connection with a pyrographic burner, and locate theblowing orifices as close as possible to the shell or burner tube toprovide for the exhaust or vent of the burner through such blowingapertures, and thus economize gas; to secure a simple and inexpensiveconstruction, and to obtain other advantages and .results as may bebrought out in the following description.

Referring to the accompanying drawings, in which like numerals ofreference indicate corresponding parts in each of the several figures,Figure 1 is a side elevation of a burner embodying my improvements inthe preferred form, and Fig. 2 `is a central longitudinal section of thesame; Fig. 3 is a central longitudinal section of a modifiedconstruction, and Fig. 4 is another central longitudinal section of astill further modification.

In said drawings, 1 indicates the body portion or lug of a pyrographicburner, pro vided at one end with a threaded portion 2 adapted to bevscrewed to a handle (not shown), and having an exterior milled flange 3to facilitate suoli attachment. An inner tube 4 extends longitudinallyof the lug through central passage thereof, and serves to convey fuel orgas to the shell or burner tube 5, inside of which tube said gas or fuelburns. The said shell or burner tube 5 is secured to the lug or bodyportion 1 in any suitable ordinary manner, as at 6, and at its forwardextremity 7 is adapted to perform any desired hind of work, as iscommon. The said inner tube 4 fits tightly in the central passage 8 ofthe lug at the rear end or threaded portion 2 thereof, but for all therest of the length of said longitudinal pas sage, the tube is reducedradially, as at 9, so as to provide an annular space between the innertube 4 and the lug, as clearly shown in Fig. 2 of the drawing. Just backof the milled flange 3, a groove 10 is cut in the lug,

Specification of Letters Patent.

Application filed January 26, 1909.

Patented July 27, 1909.

Serial No. 474,284.

and through the bottom of said groove holes 11 are drilled into thecentral passage of the lug. ther holes 12, preferably two in number asshown, are drilled from the front ofthe flange 3 through into the saidgroove 10, and a thin sleeve 13 is forced tightly onto the groovedportion of the lug bach of the flange 3, to close the groove 10 from theoutside.

The shell or burner tube 5 does not have in its side the usual vent orexhaust orifice, but the gaseous products of combustion pass backwardthrough the space between the inner tube 4 and surrounding lug, to theholes 11, and from thence through the groove 1l) and discharge orifices12. Currents thusissue from said discharge orifices which serve to blowaway the smoke created by the use of the tool. Under some conditions theinner tube 4 may be omitted, and a vent 'o ening provided in the shellor burner tu Je, in which case gas blows out through the orifices 12 todispel the smoke. This, though not so economical, is entirelysatisfactory as far as clearing away smoke is concerned.

In Figs. 3 and 4 I have shown modifications in which no inner tube isemployed, as `iust referred to. In Fig. 3, the lug is in two sections21, 22, the forward section 21 being centrally chambered or hollow atits rear end behind the [lange 23, as at 24, and into this chamber 24 isforced the head 25 of the rear section 22. Said head, however, does notreach to the bottom of the chainlier 24, but leaves a space 26 thereat,into which space blow holes 27 open from in front of the flange 23. Iothsections 21, 22 are bored out centrally and longitudinally to provide apassage leading to the shell or burner tube 23. In Fig. 4 a groove 314'is formed in the exterior of the lug 32, and borings are made throughthe bottom of this recess into the longitudinal passage 34 of theburner, as at 33. Other holes or discharge orifices 35 also lead fromsaid groove forwardly through the body of the lug, and said groove 31 isclosed exteriorly by a ring 36 pressed part way into it and forming atits outer edge a milled. or roughened finger hold for turning the lug toscrew its rear end into the handle. Some of the gas passing along theduct 34 to the shell 37, therefore, blows out through the holes 33,groove 31 and orifices 35.

Having thus described the invention, what I claim isz.

1. A pyrographic burner, comprising a body-portion or lug adapted at oneend to receive a handle and at its other end a shell or burner-tube andhaving a eentral longitudinal passage with a branch passage openingthrough the side of the lug intermediate of its said ends and directedforwardly, and said shell or burner tube.

2. A pyrogmphic burner, .Comprising a body-portion or lug adapted at oneend to receive @handle and abit-,s other @ad a 'shell or burner-tube,and having a .Central longitudinal passage, the charnber of said passagebeing intermediate of its ends thereof extended radially outward fromsaid passage, said lug having a reduced forward end POrtOn formingannular shoulder and blow holes bored through said shoulder intocommunication With said radial extension of the passage, and saiClShellor burner tube.

3. In a pyrographic burner, a lug adapted at its rearzend to be rsecuredto a handle and at its forward end to receive a shell or burnern tube,said lug having an exterior groove intermediate of said ends, a passageleading rorn said groove into said longitudinal passage, and otherpassages leading l'rorn said groove forwardly outward through the sur-Olf the lug, ,means for closing said groove outwardly, and said shell orburner-tube.

leading from said space outwardly and for-- Wardly through the sides ofthe lug.

5. yIn a pyrographio burner, the combination with a body portion or lughaving a rearward reduced portion adapted to con nect with a handle anda `forward reduced end providing a shoulder, said lug being boredcentrally and longitudinally ,and having passages leading from saidboring out through the 'front wallof saidl shoulder, a shell or Vburnertube fixed to the forward end of the lug, and an inner tube fittingtight in the rear portion oi' the central boring of the lug and beingloose therein i'or its forward portion, said tube eXtending into saidshell.

.y CHARLES U. MACY; In the presence oil- RUssELL M. EVERETT, FRANCES E.BLODGETT.

